Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/ecdddb707591
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #13674 from wilsonpage/Bug938191

Bug 938191 - [B2G][Camera][Thumbnail] Bottom of thumbnail preview contai...

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https://hg.mozilla.org/integration/gaia-central/rev/1829ccc59f21
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 938191 - [B2G][Camera][Thumbnail] Bottom of thumbnail preview contains incorrect UI